Patent US2578240A successfully refreshed from Google Patents.
US2578240A
Expired / Lapsed
US
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Nonwarping trussed door
Assignee: Individual
•
Filing: 1949-05-11
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Granted: 1951-12-11
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Expires: 1969-05-11
Abstract
No abstract record available.
Inventors
- 👤 Green George Schuyler
- 👤 Lawrence F Howatt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:41
CPC Classifications
E; E06; E06B; E06B3/00; E06B3/70; E06B3/7015; E06B3/7017; E04; E04F; E04F21/00; E04F21/0007; E06B2003/7059; E06B2003/7061; E06B2003/7063
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US138611A
Cited
US275832A
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US819876A
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US942955A
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US1239582A
Cited
US2078207A
Cited
US2089865A
Cited
US2368935A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-10 | 1955-06-11 | 1955-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-10 | 1959-06-11 | 1959-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-10 | 1963-06-11 | 1963-12-11 | $7700.00 | Window Closed / Lapsed |